import { Toast, ToastConfig } from '@/utils/toast.utils';
import React, { createContext, useContext, useMemo } from 'react';
import { Alert, Platform } from 'react-native';

export interface ToastContextType {
  showToast: (config: ToastConfig) => void;
  showSuccess: (message: string, duration?: number) => void;
  showError: (message: string, duration?: number) => void;
  showWarning: (message: string, duration?: number) => void;
}

const ToastContext = createContext<ToastContextType | undefined>(undefined);

export function ToastProvider({ children }: { children: React.ReactNode }) {
  const value = useMemo<ToastContextType>(
    () => ({
      showToast: (config: ToastConfig) => {
        try {
          Toast.show(config);
        } catch (error) {
          console.error('Toast.show failed:', error);
          // 错误边界：在原生模块失败时提供回退方案
          handleToastFallback(config.message || config.text1 || '提示', config.type);
        }
      },
      showSuccess: (message: string, duration?: number) => {
        try {
          Toast.success(message, duration);
        } catch (error) {
          console.error('Toast.success failed:', error);
          handleToastFallback(message, 'success');
        }
      },
      showError: (message: string, duration?: number) => {
        try {
          Toast.error(message, duration);
        } catch (error) {
          console.error('Toast.error failed:', error);
          handleToastFallback(message, 'error');
        }
      },
      showWarning: (message: string, duration?: number) => {
        try {
          Toast.warning(message, duration);
        } catch (error) {
          console.error('Toast.warning failed:', error);
          handleToastFallback(message, 'warning');
        }
      },
    }),
    []
  );

  return (
    <ToastContext.Provider value={value}>
      {children}
    </ToastContext.Provider>
  );
}

/**
 * 错误边界处理：在原生 Toast 模块失败时提供回退方案
 */
function handleToastFallback(message: string, type?: string) {
  if (!message) return;

  // 在 iOS 上使用 Alert 作为回退方案，避免过度打扰用户
  if (Platform.OS === 'ios') {
    // 只对错误和警告类型使用 Alert，其他类型仅记录到控制台
    if (type === 'error' || type === 'warning') {
      Alert.alert('', message, [{ text: '确定', style: 'default' }]);
    } else {
      console.log(`Toast (${type}): ${message}`);
    }
  } else {
    // 其他平台仅记录到控制台
    console.log(`Toast (${type}): ${message}`);
  }
}

export function useToast(): ToastContextType {
  const context = useContext(ToastContext);
  if (context === undefined) {
    throw new Error('useToast must be used within a ToastProvider');
  }
  return context;
}